Overview
25-35MA is a micro-alloy with small additions of reactive and rare earth elements that is especially stable at higher temperatures, and reduces carburization and surface oxidation. The service limit is 2100 degrees Fahrenheit (1150 degrees Celsius). It's also referred as HPNbMA.
Typical Uses
Petrochemical furnaces.
MetalTek Grade
MTEK 25-35MA
Similar Specifications
Typical Chemical Composition (% by wt.)
Aluminum: n/a
Carbon: 0.35-0.55
Chromium: 23-27
Manganese: 1.5
Iron: BAL
Copper: n/a
Nickel: 33-37
Lead: n/a
Tin: n/a
Silicon: 2
Zinc: n/a
Other: Mo 0.50 MAX; Nb 0.50-1.25
Minimum Mechanical Properties
Heat Treatment: Not Heat Treated
NOTES: Elongation % for static/sand is 6